configure: fix test portability
authorMaya Rashish <maya@NetBSD.org>
Thu, 10 Jan 2019 14:18:48 +0000 (16:18 +0200)
committerKristian Høgsberg <hoegsberg@gmail.com>
Sun, 24 Feb 2019 19:26:15 +0000 (19:26 +0000)
commit021c4961356c4b56b35d34b566e6f5f87d21fe34
tree5de211f3e53da3b78621e1dd090e05b004f0cba4
parent6fa923a65daf1ee73c5cc763ade91abc82da7085
configure: fix test portability

From the bash manual:

string1 == string2
string1 = string2
       True if the strings are equal.  = should be used with the test
       command for POSIX conformance.
configure.ac