Adding support for Linux s390x

We have added support for Linux s390x platform in Bazel.


Closes #1891.

--
Reviewed-on: https://github.com/bazelbuild/bazel/pull/1891
MOS_MIGRATED_REVID=135777047
diff --git a/scripts/bootstrap/buildenv.sh b/scripts/bootstrap/buildenv.sh
index 4a94687..8345dc3 100755
--- a/scripts/bootstrap/buildenv.sh
+++ b/scripts/bootstrap/buildenv.sh
@@ -40,7 +40,7 @@
 
 MACHINE_TYPE="$(uname -m)"
 MACHINE_IS_64BIT='no'
-if [ "${MACHINE_TYPE}" = 'amd64' -o "${MACHINE_TYPE}" = 'x86_64' ]; then
+if [ "${MACHINE_TYPE}" = 'amd64' -o "${MACHINE_TYPE}" = 'x86_64' -o "${MACHINE_TYPE}" = 's390x' ]; then
   MACHINE_IS_64BIT='yes'
 fi
 
@@ -49,6 +49,11 @@
   MACHINE_IS_ARM='yes'
 fi
 
+MACHINE_IS_Z='no'
+if [ "${MACHINE_TYPE}" = 's390x' ]; then
+  MACHINE_IS_Z='yes'
+fi
+
 # Extension for executables.
 EXE_EXT=""
 case "${PLATFORM}" in