ipmiutil: uncomment PARALLEL_MAKE

* it's randomly failing for last year, so it wasn't there by accident at least one race condition is on ipmilan.o:

  | obj/ipmilan.o: file not recognized: File truncated
  | collect2: error: ld returned 1 exit status
  | make[2]: *** [libipmiutil.so] Error 1
  | make[2]: *** Waiting for unfinished jobs....

* oldest failure report was on 2015-08-30
http://www.openembedded.org/wiki/Bitbake_World_Status_Jethro
and many more were reported since then in:
http://www.openembedded.org/wiki/Bitbake_World_Status_Krogoth
http://www.openembedded.org/wiki/Bitbake_World_Status
and even more
http://errors.yoctoproject.org/Errors/Search/?query=ipmiutil
e.g. good examples (not with musl)
http://errors.yoctoproject.org/Errors/Details/88674/
http://errors.yoctoproject.org/Errors/Details/85986/

---
 meta-oe/recipes-support/ipmiutil/ipmiutil_2.9.6.bb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

index 9e74df5..bdb3d47 100644
@@ -15,7 +15,7 @@ HOMEPAGE = "http://ipmiutil.sourceforge.net"
 LICENSE = "BSD-2-Clause"
 LIC_FILES_CHKSUM = "file://COPYING;md5=5f9372493401f309e6149dd2ce0a044b"
 
-#PARALLEL_MAKE = ""
+PARALLEL_MAKE = ""
 
 SRC_URI = "${SOURCEFORGE_MIRROR}/ipmiutil/ipmiutil-${PV}.tar.gz \
     file://fix_systemd_path.patch "

2.10.1