Move target #pragma after arm_neon.h include

Fix per android/ndk#1945

If the pragma is done before the header include,
when using clang compiler attribute may apply to the functions in arm_neon.h

Upstream-Status: Submitted [https://github.com/jedisct1/libsodium/pull/1321]

Signed-off-by: Khem Raj <raj.khem@gmail.com>
--- a/thirdparty/libsodium-stable/src/libsodium/crypto_aead/aes256gcm/armcrypto/aead_aes256gcm_armcrypto.c
+++ b/thirdparty/libsodium-stable/src/libsodium/crypto_aead/aes256gcm/armcrypto/aead_aes256gcm_armcrypto.c
@@ -19,12 +19,6 @@
 #define __vectorcall
 #endif
 
-#ifdef __clang__
-#pragma clang attribute push(__attribute__((target("neon,crypto,aes"))), apply_to = function)
-#elif defined(__GNUC__)
-#pragma GCC target("+simd+crypto")
-#endif
-
 #ifndef __ARM_FEATURE_CRYPTO
 #define __ARM_FEATURE_CRYPTO 1
 #endif
@@ -34,6 +28,12 @@
 
 #include <arm_neon.h>
 
+#ifdef __clang__
+#pragma clang attribute push(__attribute__((target("neon,crypto,aes"))), apply_to = function)
+#elif defined(__GNUC__)
+#pragma GCC target("+simd+crypto")
+#endif
+
 #define ABYTES    crypto_aead_aes256gcm_ABYTES
 #define NPUBBYTES crypto_aead_aes256gcm_NPUBBYTES
 #define KEYBYTES  crypto_aead_aes256gcm_KEYBYTES