openssl: passing cflags to configure

openssl sets additional cflags in its configuration script. We need to
make it aware of our custom cflags to avoid adding conflicting cflags.

Fixes: #12866
Signed-off-by: Jitao Lu <dianlujitao@gmail.com>
(cherry picked from commit 51f57e7c2d)

package/libs/openssl/Makefile

@@ -11,7 +11,7 @@ PKG_NAME:=openssl
 PKG_BASE:=1.1.1
 PKG_BUGFIX:=u
 PKG_VERSION:=$(PKG_BASE)$(PKG_BUGFIX)
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 PKG_USE_MIPS16:=0
 ENGINES_DIR=engines-1.1
 
@@ -338,6 +338,7 @@ define Build/Configure
 			--libdir=lib \
 			--openssldir=/etc/ssl \
 			--cross-compile-prefix="$(TARGET_CROSS)" \
+			$(TARGET_CFLAGS) \
 			$(TARGET_CPPFLAGS) \
 			$(TARGET_LDFLAGS) \
 			$(OPENSSL_OPTIONS) && \

package/libs/openssl/patches/106-Configure-fixup-for-octeon.patch

@@ -1,11 +0,0 @@
---- a/Configure
-+++ b/Configure
-@@ -1244,7 +1244,7 @@ if ($target =~ /^mingw/ && `$config{CC}
-         }
- 
- if ($target =~ /linux.*-mips/ && !$disabled{asm}
--        && !grep { $_ =~ /-m(ips|arch=)/ } (@{$config{CFLAGS}})) {
-+        && !grep { $_ !~ /-m(ips|arch=)/ } (@{$config{CFLAGS}})) {
-         # minimally required architecture flags for assembly modules
-         my $value;
-         $value = '-mips2' if ($target =~ /mips32/);