[PATCH] sanity.bbclass: Ensure we expand BUILD_PREFIX

[Richard Purdie <richard.purdie@linuxfoundation.org>]

This likely used to work when we expanded python functions and broke when
we stopped. Since it defaults to "", it never caused an issue but
is incorrect usage so fix it.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

diff --git a/meta/classes/sanity.bbclass b/meta/classes/sanity.bbclass
index 98345ce..202b5db 100644
--- a/meta/classes/sanity.bbclass
+++ b/meta/classes/sanity.bbclass
@@ -459,19 +459,19 @@ def check_gcc_march(sanity_data):
 
         # Check if GCC could work without march
         if not result:
-            status,res = oe.utils.getstatusoutput("${BUILD_PREFIX}gcc gcc_test.c -o gcc_test")
+            status,res = oe.utils.getstatusoutput(sanity_data.expand("${BUILD_PREFIX}gcc gcc_test.c -o gcc_test"))
             if status == 0:
                 result = True;
 
         if not result:
-            status,res = oe.utils.getstatusoutput("${BUILD_PREFIX}gcc -march=native gcc_test.c -o gcc_test")
+            status,res = oe.utils.getstatusoutput(sanity_data.expand("${BUILD_PREFIX}gcc -march=native gcc_test.c -o gcc_test"))
             if status == 0:
                 message = "BUILD_CFLAGS_append = \" -march=native\""
                 result = True;
 
         if not result:
             build_arch = sanity_data.getVar('BUILD_ARCH', True)
-            status,res = oe.utils.getstatusoutput("${BUILD_PREFIX}gcc -march=%s gcc_test.c -o gcc_test" % build_arch)
+            status,res = oe.utils.getstatusoutput(sanity_data.expand("${BUILD_PREFIX}gcc -march=%s gcc_test.c -o gcc_test" % build_arch))
             if status == 0:
                 message = "BUILD_CFLAGS_append = \" -march=%s\"" % build_arch
                 result = True;