package/libopenssl: fix issue when compiling with BR2_OPTIMIZE_G=y

For instance on risc-v 64 arch the build would otherwise fail because
of undefined ucontext_t because "-DOPENSSL_NO_ASYNC" would not propagate
through to CFLAGS in the Makefile.

Signed-off-by: Yann Sionneau <ysionneau@kalray.eu>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
(cherry picked from commit a00b6354a20e46f0623ed4dd25b8cc47b9ab3d44)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/libopenssl/libopenssl.mk

@@ -65,7 +65,7 @@ define HOST_LIBOPENSSL_CONFIGURE_CMDS
 		shared \
 		zlib-dynamic \
 	)
-	$(SED) "s#-O[0-9s]#$(HOST_CFLAGS)#" $(@D)/Makefile
+	$(SED) "s#-O[0-9sg]#$(HOST_CFLAGS)#" $(@D)/Makefile
 endef
 
 define LIBOPENSSL_CONFIGURE_CMDS
@@ -89,7 +89,7 @@ define LIBOPENSSL_CONFIGURE_CMDS
 			$(if $(BR2_STATIC_LIBS),zlib,zlib-dynamic) \
 	)
 	$(SED) "s#-march=[-a-z0-9] ##" -e "s#-mcpu=[-a-z0-9] ##g" $(@D)/Makefile
-	$(SED) "s#-O[0-9s]#$(LIBOPENSSL_CFLAGS)#" $(@D)/Makefile
+	$(SED) "s#-O[0-9sg]#$(LIBOPENSSL_CFLAGS)#" $(@D)/Makefile
 	$(SED) "s# build_tests##" $(@D)/Makefile
 endef