Fix & test kissfft build

.build.yml

@@ -19,6 +19,7 @@ tasks:
       meson build_speex -Dresampler=speex
       meson build_libsamplerate -Dresampler=libsamplerate
       meson build_fftw -Dfft=fftw
+      meson build_kissfft -Dfft=kissfft
   - build: |
       cd rubberband
       ninja -C build
@@ -33,6 +34,9 @@ tasks:
       ninja -C build_fftw
       meson test -C build_fftw
       build_fftw/rubberband -V
+      ninja -C build_kissfft
+      meson test -C build_kissfft
+      build_kissfft/rubberband -V
       ./otherbuilds/check.sh
 triggers:
   - action: email

meson.build

@@ -172,9 +172,9 @@ elif fft == 'kissfft'
   if fftw3_dep.found()
     message('(to use FFTW instead, reconfigure with -Dfft=fftw)')
   endif
-  feature_sources += ['src/kissfft/kiss_fft.c', 'src/kissfft/kiss_fftr.c']
+  feature_sources += ['src/ext/kissfft/kiss_fft.c', 'src/ext/kissfft/kiss_fftr.c']
   feature_defines += ['-DHAVE_KISSFFT']
-  general_include_dirs += 'src/kissfft'
+  general_include_dirs += 'src/ext/kissfft'
 
 elif fft == 'fftw'
   if fftw3_dep.found()