ICU-20526 fix pkgdata where LD_SONAME has a trailing space

- added PKGDATA_TRAILING_SPACE to all of the pkgdataMakefile.in file.
- NOTE: Users who create their own pkgdata.inc / icupkg.inc files may need
   to recreate this PKGDATA_TRAILING_SPACE behavior.

- used the above variable, normally undefined, in mh-* files that need a trailing space

- Also, fixed use of system() in pkgdata.cpp per ICU-20538
This was causing pkgdata to return a zero status even on clang
failure, masking this issue.

(cherry picked from commit 83a0542b5b52a30b7af736f5ef6b0405f6582867)
8 files changed
tree: 3c2832a107ae82619dd7254bb44b4016b366a976
  1. .ci-builds/
  2. .github/
  3. icu4c/
  4. icu4j/
  5. tools/
  6. vendor/
  7. .appveyor.yml
  8. .cpyskip.txt
  9. .gitattributes
  10. .gitignore
  11. .travis.yml
  12. README.md
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International Components for Unicode

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