tests/tcg: override runners for broken tests

To get a clean run of check-tcg these tests are currently skipped:

  - hello-mips for mips
  - linux-test for sparc
Signed-off-by: NAlex Bennée <alex.bennee@linaro.org>
Tested-by: NPhilippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: NPhilippe Mathieu-Daudé <f4bug@amsat.org>

tests/tcg/mips/Makefile.target

@@ -17,3 +17,6 @@ hello-mips: LDFLAGS+=-nostdlib
 
 # For MIPS32 and 64 we have a bunch of extra tests in sub-directories
 # however they are intended for system tests.
+
+run-hello-mips: hello-mips
+	$(call skip-test, $<, "BROKEN")

tests/tcg/sparc64/Makefile.target

 # -*- Mode: makefile -*-
 #
-# sparc specific tweaks
+# sparc specific tweaks and masking out broken tests
+
+# different from the other hangs:
+# tests/tcg/multiarch/linux-test.c:264: Value too large for defined data type (ret=-1, errno=92/Value too large for defined data type)
+run-linux-test: linux-test
+	$(call skip-test, $<, "BROKEN")
 
 # On Sparc64 Linux support 8k pages
 EXTRA_RUNS+=run-test-mmap-8192