mozjs38-38.2.1-bp156.10.7

- Actually remove bundled zlib and use system zlib. Also fixes problems
  when trying to use system zlib while mozjs38-devel is installed
  (two zlib.h instances with conflicting definitions)

- update RPM group for main package for consistency

- change pkg-config name from js to mozjs-38

- fix configure with for sed >= 4.3 (boo#1020631) (mozilla-sed43.patch)

- devel package should not symlink to build directory boo#992065

- add _constraints for 7GB memory for ppc64le in Factory:PowerPC

- Fix 48 virtual address space systems like upstream (bsc#984126)
  (mozjs-support-48bit-va.patch)

- three patches added to avoid build errors from initial rc0
  mozjs38_missing_zlib_moz_build.patch
  mozjs38_avoid_strncat_warning_inline.patch
  mozjs38_missing_python_before_milestone_call

- first version of mozjs38 that is still beta from
  https://people.mozilla.org/~sstangl/mozjs-38.2.1.rc0.tar.bz2