Revert "build/make/version.sh: Fix read of git hash when there are no tags."
Revert "build/make/version.sh: Fix read of git hash when there are no tags."

This reverts commit 872c31d4ce568ac2410a84ea67ae16d2e6f53ec7.

Depending on the short commit hash (one that starts with a digit) this
will set major/minor/patch to the same value which will be used by
aom_codec_version() resulting in a warning due to the version number
exceeding 32-bits.

BUG=https://bugs.chromium.org/p/aomedia/issues/detail?id=4

Change-Id: I18751004f8436a1d3e31aaf5683fbc7d63825a6a

GrokImageCompression/aom,mbebenita/aom,mbebenita/aom,shacklettbp/aom,luctrudeau/aom,luctrudeau/aom,smarter/aom,shacklettbp/aom,shacklettbp/aom,shacklettbp/aom,mbebenita/aom,smarter/aom,mbebenita/aom,shacklettbp/aom,luctrudeau/aom,GrokImageCompression/aom,mbebenita/aom,GrokImageCompression/aom,GrokImageCompression/aom,mbebenita/aom,smarter/aom,mbebenita/aom,smarter/aom,luctrudeau/aom,GrokImageCompression/aom,mbebenita/aom,luctrudeau/aom,GrokImageCompression/aom,mbebenita/aom,shacklettbp/aom,luctrudeau/aom,smarter/aom,smarter/aom