runtime: ask $GOC rather than $CC for the version and multi-os-directory

The Go compiler may have different values for these than the C compiler.

From-SVN: r209967

libgo/Makefile.am

@@ -962,7 +962,7 @@ s-version: Makefile
 	rm -f version.go.tmp
 	echo "package runtime" > version.go.tmp
 	echo 'const defaultGoroot = "$(prefix)"' >> version.go.tmp
-	echo 'const theVersion = "'`$(CC) --version | sed 1q`'"' >> version.go.tmp
+	echo 'const theVersion = "'`$(GOC) --version | sed 1q`'"' >> version.go.tmp
 	echo 'const theGoarch = "'$(GOARCH)'"' >> version.go.tmp
 	echo 'const theGoos = "'$(GOOS)'"' >> version.go.tmp
 	$(SHELL) $(srcdir)/../move-if-change version.go.tmp version.go

libgo/Makefile.in

@@ -4357,7 +4357,7 @@ s-version: Makefile
 	rm -f version.go.tmp
 	echo "package runtime" > version.go.tmp
 	echo 'const defaultGoroot = "$(prefix)"' >> version.go.tmp
-	echo 'const theVersion = "'`$(CC) --version | sed 1q`'"' >> version.go.tmp
+	echo 'const theVersion = "'`$(GOC) --version | sed 1q`'"' >> version.go.tmp
 	echo 'const theGoarch = "'$(GOARCH)'"' >> version.go.tmp
 	echo 'const theGoos = "'$(GOOS)'"' >> version.go.tmp
 	$(SHELL) $(srcdir)/../move-if-change version.go.tmp version.go

libgo/configure

@@ -13444,7 +13444,7 @@ else
   nover_glibgo_toolexecdir='${libdir}/gcc/${host_alias}'
   nover_glibgo_toolexeclibdir='${libdir}'
 fi
-multi_os_directory=`$CC -print-multi-os-directory`
+multi_os_directory=`$GOC -print-multi-os-directory`
 case $multi_os_directory in
   .) ;; # Avoid trailing /.
   *) nover_glibgo_toolexeclibdir=${nover_glibgo_toolexeclibdir}/${multi_os_directory} ;;

libgo/configure.ac

@@ -88,7 +88,7 @@ else
   nover_glibgo_toolexecdir='${libdir}/gcc/${host_alias}'
   nover_glibgo_toolexeclibdir='${libdir}'
 fi
-multi_os_directory=`$CC -print-multi-os-directory`
+multi_os_directory=`$GOC -print-multi-os-directory`
 case $multi_os_directory in
   .) ;; # Avoid trailing /.
   *) nover_glibgo_toolexeclibdir=${nover_glibgo_toolexeclibdir}/${multi_os_directory} ;;