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

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

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

Reviewed-by: tbell

Reviewed-by: alanb

Reviewed-by: simonis, tbell, erikj

Summary: Build system tweaks to allow building on OS X 10.9 and later
Reviewed-by: erikj

Reviewed-by: ihse, twisti

Reviewed-by: erikj

Reviewed-by: tbell, ihse

Reviewed-by: ihse, tbell

Reviewed-by: tbell, ihse

Summary: Need to generated autoconf changes
Reviewed-by: paulk

Reviewed-by: coffeys

Reviewed-by: katleman