remove useless hardcoded march
--- a/src/runtime/Config.arm-linux
+++ b/src/runtime/Config.arm-linux
@@ -9,7 +9,6 @@
 # provided with absolutely no warranty. See the COPYING and CREDITS
 # files for more information.

-CFLAGS += -marm -march=armv5t

 ASSEM_SRC = arm-assem.S
 ARCH_SRC = arm-arch.c