Disable tracejit on OSs it's not supported on.

Only supported on FreeBSD, Linux, Solaris, OS/2, GNU, Cygwin, and Darwin
Should allow OpenBSD to build JS engine.

3rdp/build/GNUmakefile

@@ -27,6 +27,17 @@ ifeq ($(shell perl -e 'print "$(machine)"=~/\.arm/?"YES":"NO"'),YES)
   endif
  endif
 endif
+# OS/2 and "GNU" (HURD?) also need this, but we never plan to support them.
+ifneq ($(os),darwin)
+ ifneq ($(os),linux)
+  ifneq ($(os),freebsd)
+   ifneq ($(os),sunos)
+    JS_CONFIGURE_ARGS += '--disable-tracejit'
+   endif
+  endif
+ endif
+endif
+
 JS_CONFIGURE_ENV += 'CXXFLAGS=$(CXXFLAGS)'
 
 .PHONY: cryptlib libmozjs