aclocal.m4: call cygpath on mingw32 only
authorSergei Trofimovich <slyfox@gentoo.org>
Wed, 20 Sep 2017 22:18:22 +0000 (23:18 +0100)
committerSergei Trofimovich <slyfox@gentoo.org>
Wed, 20 Sep 2017 22:18:22 +0000 (23:18 +0100)
commitd7705f2fbead058700940321982a6315450dbcd1
treee0436675db75fd8d40cf754e2cf1082e53b67dbc
parent02ff70563e490d2a7f3141eab7229803c523da57
aclocal.m4: call cygpath on mingw32 only

The only reason I noticed is warning these lines on linux:

```
$ ./configure --target=sparc-unknown-linux-gnu
...
./configure: line 9708: cygpath: command not found
./configure: line 9708: ArCmd: command not found
```

POSIX shell syntax requires no spaces in assignments.
Fixed guarding condition while at it.

Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
aclocal.m4