qemu: rename internal crypto/aes symbols

Qemu's local AES code defines symbols that conflict with
LibreSSL/OpenSSL's libcrypto. Rename them to avoid build problems.

See upstream commit c8d70e59738e672021926c7747af8ef9dea15c82.

Fixes FS#444.

Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>

tools/qemu/Makefile

@@ -16,7 +16,13 @@ PKG_HASH:=33ceae3fbe516f2cbb151dc98d16c8ccfec74b1056674ad715e75a2f7fed45c3
 
 include $(INCLUDE_DIR)/host-build.mk
 
-HOST_CFLAGS += -I$(STAGING_DIR_HOST)/include/e2fsprogs
+HOST_CFLAGS += \
+	-I$(STAGING_DIR_HOST)/include/e2fsprogs \
+	-DAES_cbc_encrypt=QEMU_AES_cbc_encrypt \
+	-DAES_decrypt=QEMU_AES_decrypt \
+	-DAES_encrypt=QEMU_AES_encrypt \
+	-DAES_set_decrypt_key=QEMU_AES_set_decrypt_key \
+	-DAES_set_encrypt_key=QEMU_AES_set_encrypt_key
 
 HOST_CONFIGURE_VARS := \
 	CFLAGS="$(HOST_CFLAGS)" \