Summary: remove DRAGONWELL_EXTRA_CFLAGS and provide default values for vendor information

Test Plan: build successfully on Windows & Linux

Reviewed-by: mmyxym

Issue: https://github.com/alibaba/dragonwell8/issues/108

Summary: Create separate version file for dragonwell. Integrate dragonwell information into makefile.

Test Plan: Sanity test by make.sh

Reviewed-by: luchsh

Issue: https://github.com/alibaba/dragonwell8/issues/25

Summary: Also includes JDK-8151841 version changes regressed by JDK-8034788
Reviewed-by: aph, andrew

Reviewed-by: mdoerr, apetushkov

8238960: linux-i586 builds are inconsistent as the newly build jdk is not able to reserve enough space for object heap
Reviewed-by: andrew

Reviewed-by: andrew

8235142: JDK-8193255 backport broke bootstrap with JDK 10
Reviewed-by: sgehwolf

Reviewed-by: aph, neugens

Summary: Disable JFR by default when minimal or zero VM build is requested
Reviewed-by: andrew

Summary: Set the configure enable-jfr flag to true by default.
Reviewed-by: andrew

Reviewed-by: andrew, ihse, martin

--HG--
extra : rebase_source : 2a25c760fc8d468cccafe00de91fe0d3b9d86c8b
extra : amend_source : 83bcf47ccd45089930e82168efd66c8b03c63fbc

Reviewed-by: shade

Reviewed-by: sgehwolf, andrew
Contributed-by: andrew_m_leonard@uk.ibm.com

8199712: Flight Recorder
8203346: JFR: Inconsistent signature of jfr_add_string_constant
8195817: JFR.stop should require name of recording
8195818: JFR.start should increase autogenerated name by one
8195819: Remove recording=x from jcmd JFR.check output
8203921: JFR thread sampling is missing fixes from JDK-8194552
8203929: Limit amount of data for JFR.dump
8203664: JFR start failure after AppCDS archive created with JFR StartFlightRecording
8003209: JFR events for network utilization
8207392: [PPC64] Implement JFR profiling
Summary: Backport JFR from JDK11. Initial integration
Reviewed-by: neugens

8223219: Backport of JDK-8199552 to OpenJDK 8 leads to duplicate -fstack-protector flags, overriding --with-extra-cflags
Summary: Apply -fstack-protector to all archs and remove duplication in JDK build
Reviewed-by: sgehwolf

Summary: Compile fdlibm with -O3 and relevant C flags on gcc arches.
Reviewed-by: mbaesken, andrew

Reviewed-by: erikj, dholmes

Reviewed-by: erikj, martin, tbell, aph

Reviewed-by: shade

Reviewed-by: serb, erikj

Reviewed-by: jwilhelm

Reviewed-by: tbell, erikj

8073139: PPC64: User-visible arch directory and os.arch value on ppc64le cause issues with Java tooling
Reviewed-by: erikj, goetz, dholmes

Summary: Generate debug info for assembler files as needed.
Reviewed-by: erikj

Reviewed-by: erikj

Reviewed-by: erikj

Reviewed-by: erikj

Reviewed-by: erikj

Reviewed-by: tbell

Summary: Keep the ccache work-around so as to not break Oracle internal JDK 8 builds.
Reviewed-by: erikj, kevinw

Reviewed-by: dholmes, erikj

Reviewed-by: erikj, herrick

Reviewed-by: dholmes, erikj

Reviewed-by: asemenyuk, jqzuo

Summary: C++ standard needs to be explicitly set and some optimisations turned off to build on GCC 6
Reviewed-by: erikj, dholmes, kbarrett

Reviewed-by: dcubed, mikael

Reviewed-by: ihse, tbell

Reviewed-by: erikj, collins

Reviewed-by: erikj, collins

Reviewed-by: ihse, tbell