build/x86: also test the stack protector on x86 secondary arch

on x86, gcc emits a local reference to __stack_chk_fail_local
which can only be provided by a static library. as we don't have
a libroot_nonshared, we use libgcc from gcc, in which libssp_nonshared
was merged, from version 8.3.0_2019_05_24-11.

Change-Id: I22bf26dec5c1fe69a3915a923bd716a494f846ce
Reviewed-on: https://review.haiku-os.org/c/haiku/+/4564
Reviewed-by: Jérôme Duval <[email protected]>

src/system/libroot/stubbed/libroot_stubs.c

@@ -2739,6 +2739,8 @@ void srand48() {}
 void srand48_r() {}
 void srandom() {}
 void srandom_r() {}
+void __stack_chk_fail() {}
+void __stack_chk_fail_local() {}
 void sscanf() {}
 void statvfs() {}
 void stime() {}

src/tests/system/libroot/os/Jamfile

@@ -30,10 +30,14 @@ SimpleTest get_cpu_num_test :
 
 
 CCFLAGS += -fstack-protector ;
-SimpleTest stack_protector_test :
+local architectureObject ;
-	stack_protector_test.c
+for architectureObject in [ MultiArchSubDirSetup ] {
-;
+	on $(architectureObject) {
-
+		SimpleTest [ MultiArchDefaultGristFiles stack_protector_test ] :
+			stack_protector_test.c
+		;
+	}
+}
 
 
 # Tell Jam where to find these sources