Bugzilla bug #14126: quote $(OS_RELEASE) in the shell command.

Thanks to Greg Noel <GregNoel@san.rr.com> for the bug report
and the fix.  Reviewed by Greg Noel and tested on several flavors
of Linux (x86, sparc, alpha, and ppc) and FreeBSD.

nsprpub/config/arch.mk

@@ -95,7 +95,7 @@ endif
 #
 
 ifeq (,$(filter-out Linux FreeBSD,$(OS_ARCH)))
-OS_RELEASE	:= $(shell echo $(OS_RELEASE) | sed 's/-.*//')
+OS_RELEASE	:= $(shell echo "$(OS_RELEASE)" | sed 's/-.*//')
 endif
 
 #