build: Add missing shell detection

`tools/wrapper/*.sh` assume there is a `SH` variable defined, but the
check was missing.  The detection will be overridden if before running
`./waf configure` a SH environmental variable is defined. For example,

    SH=/usr/local/bin/bash ./waf configure ...

Change-Id: I23fae1630a6b2b7c2083cce9d068af4aaa256cd4
1 file changed
tree: e3d0e0ac8a6b98b3152e373f05ea841b7d27f9fb
  1. .waf-tools/
  2. docs/
  3. examples/
  4. src/
  5. tests/
  6. tests-integrated/
  7. tools/
  8. .gitignore
  9. .travis.yml
  10. AUTHORS.md
  11. CHANGELOG
  12. client.conf.sample
  13. COPYING
  14. INSTALL.md
  15. libndn-cpp-dev.pc.in
  16. README.md
  17. waf
  18. wscript
README.md

ndn-cpp-dev: A dev version of Named Data Networking client library for C++

ndn-cpp-dev is a new implementation of a Named Data Networking client library written in C++.

ndn-cpp-dev is open source under a license described in the file COPYING. While the license does not require it, we really would appreciate it if others would share their contributions to the library if they are willing to do so under the same license.

See the file INSTALL for build and install instructions.

Please submit any bugs or issues to the ndn-cpp-dev issue tracker: http://redmine.named-data.net/projects/ndn-cpp-dev/issues

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Additional library tutorials and manpages are available in docs/ folder.