strace: Fix build with mips/mips64 on musl

SIGEMT doesnt exist on musl

(From OE-Core rev: a18457e3318da21b642018897a0df29cb543deea)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/strace/strace/mips-SIGEMT.patch

@@ -0,0 +1,24 @@
+SIGEMT is not defined everywhere e.g musl does
+not define it. Therefore check it being defined
+before using it.
+
+Fixes errors e.g.
+../../strace-4.13/tests/signal2name.c:45:7: error: 'SIGEMT' undeclared (first use in this function)
+
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+Upstream-Status: Pending
+
+Index: strace-4.13/tests/signal2name.c
+===================================================================
+--- strace-4.13.orig/tests/signal2name.c
++++ strace-4.13/tests/signal2name.c
+@@ -42,7 +42,9 @@ signal2name(int sig)
+ 	CASE(SIGEMT);
+ 	CASE(SIGLOST);
+ #elif defined MIPS
++#ifdef SIGEMT
+ 	CASE(SIGEMT);
++#endif
+ 	CASE(SIGIOT);
+ 	CASE(SIGPWR);
+ #else

meta/recipes-devtools/strace/strace_4.13.bb

@@ -12,6 +12,7 @@ SRC_URI = "${SOURCEFORGE_MIRROR}/strace/strace-${PV}.tar.xz \
            file://Makefile-ptest.patch \
            file://run-ptest \
            file://0001-Fix-build-when-using-non-glibc-libc-implementation-o.patch \
+           file://mips-SIGEMT.patch \
            "
 
 SRC_URI[md5sum] = "4b78c7febdd24c79d5147824d1a080a3"