[CRYPTO]: Make padding[] array static in sha{256,512}_final().

Also happens to work around a GCC bug.

crypto/sha256.c

@@ -295,7 +295,7 @@ static void sha256_final(void* ctx, u8 *out)
 	u8 bits[8];
 	unsigned int index, pad_len, t;
 	int i, j;
-	const u8 padding[64] = { 0x80, };
+	static u8 padding[64] = { 0x80, };
 
 	/* Save number of bits */
 	t = sctx->count[0];

crypto/sha512.c

@@ -249,7 +249,7 @@ sha512_final(void *ctx, u8 *hash)
 {
         struct sha512_ctx *sctx = ctx;
 	
-        const static u8 padding[128] = { 0x80, };
+        static u8 padding[128] = { 0x80, };
 
         u32 t;
 	u64 t2;