libgo: fix for runtime/check failure with "-O0 -g"

    
    Tweak the makefile rules for the runtime/check test to
    insure that the runtime package is compiled with
    "-fgo-compiling-runtime". This resolves a test failure
    (unsat on runtime.getcallerpc) when in a build directory where the
    compiler flags have been configured to disable optimization.
    
    Reviewed-on: https://go-review.googlesource.com/30010

From-SVN: r240588

gcc/go/gofrontend/MERGE

-4046a883070c1f5f58de336f7378f3bca69ea2b6
+c79a35411c1065c71add196fdeca6e5207a79248
 
 The first line of this file holds the git revision number of the last
 merge done from the gofrontend repository.

libgo/Makefile.am

@@ -1291,6 +1291,7 @@ runtime.inc: s-runtime-inc; @true
 s-runtime-inc: runtime-go.lo
 	$(SHELL) $(srcdir)/mvifdiff.sh runtime.inc.tmp runtime.inc
 	$(STAMP) $@
+runtime_check_GOCFLAGS = -fgo-compiling-runtime
 runtime/check: $(CHECK_DEPS)
 	@$(CHECK)
 .PHONY: runtime/check

libgo/Makefile.in

@@ -1249,6 +1249,7 @@ CHECK_DEPS = $(toolexeclibgo_DATA) $(toolexeclibgoarchive_DATA) \
 @LIBGO_IS_SOLARIS_FALSE@matchargs_os = 
 extra_go_files_runtime = runtime_sysinfo.go
 runtime_go_lo_GOCFLAGS = -fgo-c-header=runtime.inc.tmp -fgo-compiling-runtime
+runtime_check_GOCFLAGS = -fgo-compiling-runtime
 @LIBGO_IS_BSD_TRUE@golang_org_x_net_route_lo = \
 @LIBGO_IS_BSD_TRUE@	golang_org/x/net/route/route.lo