libelftc/testsuite: Check test coverage of EM_* values.
libelftc/testsuite: Test name translation of recently added EM_* values.
elfconstants: Add EM_PPU (T-HEAD Parallel Processing Unit).
mk: Add a 'memcheck-test' target.
libelf/testsuite: Fix a -Wsigned-compare warning.
Use a dedicated header for elftc_get_program_name(3).
libelf/testsuite: Avoid the use of 'result' status variables.
libelf/test-suite: Convert tests to not use 'result' variables.