- Avoid confusing library path

- Add upstream patch bash-4.3-PS4-fix.patch based on a0c0a00f to
fix minor VUL-1: CVE-2016-7543: bash SHELLOPTS+PS4 (bsc#1001299)

- Add upstream patch bash-4.3-prompt-string-comsub.patch to
fix minor VUL-1: CVE-2016-0634 bash: Arbitrary code execution via
malicious hostname (bsc#1000396)

- Add patch bash-4.2-async-bnc971410.dif which is a backport
from bash-4.4-rc1 to fix a crash found during debugging done
for bug bnc#971410
- Add patch bash-4.2-boo976776.dif which is a backport from current
bash-4.3 to fix a crash if ~/.bash_history is empty (boo#976776)