Fix warnings in coreboot utilities.

- Fix some poor programming practice (breaks of strict aliasing as well
  as not checking the return value of read)
- Use PRIx64 instead of %llx to prevent compilation warnings with both
  32bit and 64bit compilers
- Use same compiler command options when linking inteltool and when
  detecting libpci for inteltool

Change-Id: I08b2e8d1bbc908f6b1f26d25cb3a4b03d818e124
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Reviewed-on: http://review.coreboot.org/752
Tested-by: build bot (Jenkins)
Reviewed-by: Mathias Krause <minipli@googlemail.com>

util/inteltool/cpu.c

@@ -57,7 +57,7 @@ int msr_readerror = 0;
 
 msr_t rdmsr(int addr)
 {
-	uint8_t buf[8];
+	uint32_t buf[2];
 	msr_t msr = { 0xffffffff, 0xffffffff };
 
 	if (lseek(fd_msr, (off_t) addr, SEEK_SET) == -1) {
@@ -67,9 +67,8 @@ msr_t rdmsr(int addr)
 	}
 
 	if (read(fd_msr, buf, 8) == 8) {
-		msr.lo = *(uint32_t *)buf;
-		msr.hi = *(uint32_t *)(buf + 4);
-
+		msr.lo = buf[0];
+		msr.hi = buf[1];
 		return msr;
 	}