iOS builds use the static ARM CPU configuration.

The other codepath is Linux-specific. This should get tidied up a bit but, in
the meantime, fix the Chromium iOS (NO_ASM) build. Even when the assembly gets
working, it seems iOS prefers you make fat binaries rather than detect features
at runtime, so this is what we want anyway.

BUG=548539

Change-Id: If19b2e380a96918b07bacc300a3a27b885697b99
Reviewed-on: https://boringssl-review.googlesource.com/6380
Reviewed-by: Adam Langley <agl@google.com>

include/openssl/cpu.h

@@ -95,6 +95,11 @@ extern uint32_t OPENSSL_ia32cap_P[4];
 
 #if defined(OPENSSL_ARM) || defined(OPENSSL_AARCH64)
 
+#if defined(OPENSSL_APPLE)
+/* iOS builds use the static ARM configuration. */
+#define OPENSSL_STATIC_ARMCAP
+#endif
+
 #if !defined(OPENSSL_STATIC_ARMCAP)
 
 /* CRYPTO_is_NEON_capable returns true if the current CPU has a NEON unit. Note