.travis.yml: remove "make check" from main matrix

There are problems with unreliability in "make check" which still need
to be tracked down. As the tests are broadly the same for all targets if
added one explicit target to the matrix to run it. However this does
build all softmmu targets to ensure they at least "run"
Signed-off-by: NAlex Bennée <alex.bennee@linaro.org>
Reviewed-by: NAlexander Graf <agraf@suse.de>
Reviewed-by: NBrian Jackson <iggy@theiggy.com>
Signed-off-by: NMichael Tokarev <mjt@tls.msk.ru>

.travis.yml

@@ -12,7 +12,7 @@ notifications:
     on_failure: always
 env:
   global:
-    - TEST_CMD="make check"
+    - TEST_CMD=""
     - EXTRA_CONFIG=""
     # Development packages, EXTRA_PKGS saved for additional builds
     - CORE_PKGS="libusb-1.0-0-dev libiscsi-dev librados-dev libncurses5-dev"
@@ -48,10 +48,23 @@ before_install:
 before_script:
   - ./configure --target-list=${TARGETS} --enable-debug-tcg ${EXTRA_CONFIG}
 script:
-  - make -j2 && {TEST_CMD}
+  - make -j2 && ${TEST_CMD}
 matrix:
   # We manually include a number of additional build for non-standard bits
   include:
+    # Make check target (we only do this once)
+    - env:
+        - TARGETS=alpha-softmmu,arm-softmmu,aarch64-softmmu,cris-softmmu,
+                  i386-softmmu,x86_64-softmmu,m68k-softmmu,microblaze-softmmu,
+                  microblazeel-softmmu,mips-softmmu,mips64-softmmu,
+                  mips64el-softmmu,mipsel-softmmu,or32-softmmu,ppc-softmmu,
+                  ppc64-softmmu,ppcemb-softmmu,s390x-softmmu,sh4-softmmu,
+                  sh4eb-softmmu,sparc-softmmu,sparc64-softmmu,
+                  unicore32-softmmu,unicore32-linux-user,
+                  lm32-softmmu,moxie-softmmu,tricore-softmmu,xtensa-softmmu,
+                  xtensaeb-softmmu
+          TEST_CMD="make check"
+      compiler: gcc
     # Debug related options
     - env: TARGETS=i386-softmmu,x86_64-softmmu
            EXTRA_CONFIG="--enable-debug"
@@ -80,7 +93,6 @@ matrix:
       compiler: gcc
     - env: TARGETS=i386-softmmu,x86_64-softmmu
            EXTRA_CONFIG="--enable-trace-backends=ftrace"
-           TEST_CMD=""
       compiler: gcc
     - env: TARGETS=i386-softmmu,x86_64-softmmu
           EXTRA_PKGS="liblttng-ust-dev liburcu-dev"