make test: invalid ELF header

[Mark Eackloff]

gnucash 1.8.12 on RedHat Enterprise Linux 4:
make ran with zero return code.
make check complains about numerous modules with "invalid ELF header" in
../../../src/gnc-module/.libs/ begining with libgncmodule.a
FAIL: test-load-c
FAIL: test-load-scm
FAIL: test-gwrapped-c
FAIL: test-scm-module
FAIL: test-scm-multi
FAIL: test-load-deps
FAIL: test-adgdver
FAIL: test-dynload
FAIL: test-scm-dynload
FAIL: test-scm-init
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10 of 12 tests failed
=====================

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