Before WAMR 1.3.0, eabihf in wamrc is `gnueabihf`, so without
this patch call wamrc will failed with target abi was `eabihf`,
we should convert the standard llvm target to wamrc required.
Both `eabihf` and `gnueabihf` supported after WAMR 1.3.0.
Signed-off-by: Huang Qi <huangqi3@xiaomi.com>