Fix GNU make v3.80 compatibility
Fix GNU make v3.80 compatibility

Commits 1f6601a and 094d82d introduced the "else ifeq" construct, which
requires GNU make v3.81 or higher.  This breaks the build on RHEL4 hosts.

Signed-off-by: Kevin Cernekee <3105dbb3dd63fbb4f6371cfb04adc6726f76c56b@gmail.com>
Signed-off-by: Bernhard Reutner-Fischer <ce1ac9e9ad16abccd7821f371ad381197b4768ac@gmail.com>

skristiansson/uClibc-or1k,atgreen/uClibc-moxie,hwoarang/uClibc,ysat0/uClibc,m-labs/uclibc-lm32,majek/uclibc-vx32,wbx-github/uclibc-ng,hjl-tools/uClibc,brgl/uclibc-ng,czankel/xtensa-uclibc,waweber/uclibc-clang,brgl/uclibc-ng,hwoarang/uClibc,waweber/uclibc-clang,ffainelli/uClibc,hjl-tools/uClibc,hjl-tools/uClibc,majek/uclibc-vx32,ddcc/klee-uclibc-0.9.33.2,foss-for-synopsys-dwc-arc-processors/uClibc,ddcc/klee-uclibc-0.9.33.2,czankel/xtensa-uclibc,skristiansson/uClibc-or1k,ysat0/uClibc,mephi42/uClibc,ndmsystems/uClibc,wbx-github/uclibc-ng,m-labs/uclibc-lm32,skristiansson/uClibc-or1k,atgreen/uClibc-moxie,kraj/uClibc,kraj/uClibc,groundwater/uClibc,hwoarang/uClibc,ysat0/uClibc,foss-xtensa/uClibc,foss-for-synopsys-dwc-arc-processors/uClibc,groundwater/uClibc,groundwater/uClibc,ffainelli/uClibc,hwoarang/uClibc,groundwater/uClibc,kraj/uClibc,kraj/uclibc-ng,skristiansson/uClibc-or1k,m-labs/uclibc-lm32,atgreen/uClibc-moxie,waweber/uclibc-clang,ndmsystems/uClibc,ffainelli/uClibc,kraj/uclibc-ng,czankel/xtensa-uclibc,mephi42/uClibc,kraj/uClibc,ddcc/klee-uclibc-0.9.33.2,atgreen/uClibc-moxie,czankel/xtensa-uclibc,majek/uclibc-vx32,m-labs/uclibc-lm32,groundwater/uClibc,wbx-github/uclibc-ng,foss-for-synopsys-dwc-arc-processors/uClibc,ysat0/uClibc,hjl-tools/uClibc,kraj/uclibc-ng,mephi42/uClibc,brgl/uclibc-ng,brgl/uclibc-ng,foss-xtensa/uClibc,ffainelli/uClibc,ddcc/klee-uclibc-0.9.33.2,ndmsystems/uClibc,foss-for-synopsys-dwc-arc-processors/uClibc,foss-xtensa/uClibc,wbx-github/uclibc-ng,foss-xtensa/uClibc,kraj/uclibc-ng,mephi42/uClibc,majek/uclibc-vx32,ffainelli/uClibc,ndmsystems/uClibc,hjl-tools/uClibc,waweber/uclibc-clang