...and fix a cross-compile link failure on travis with older mingw-w64.

.travis.yml

@@ -3,7 +3,6 @@ matrix:
   include:
     - compiler: clang
     - compiler: gcc
-      env: HOST=
     - compiler: gcc
       env: HOST=i686-w64-mingw32
 before_install:

Makefile.am

@@ -69,7 +69,7 @@ EXTRA_src_libcubeb_la_SOURCES = \
 	src/cubeb_winmm.c src/cubeb_wasapi.cpp src/speex/resample.c \
 	src/cubeb_opensl.c src/cubeb_audiotrack.c
 
-src_libcubeb_la_LDFLAGS = -pthread -export-symbols-regex '^cubeb_' $(platform_lib) -no-undefined
+src_libcubeb_la_LDFLAGS = -export-symbols-regex '^cubeb_' $(platform_lib) -no-undefined
 
 check_PROGRAMS = test/test_sanity test/test_tone test/test_audio test/test_latency