Adds MIPS files to the make dist tarball

Makefile.am

@@ -146,6 +146,7 @@ EXTRA_DIST = version.mk \
              opus.pc.in \
              opus-uninstalled.pc.in \
              opus.m4 \
+             Makefile.mips \
              Makefile.unix \
              tests/run_vectors.sh \
              celt/arm/arm2gnu.pl \

celt_headers.mk

@@ -37,5 +37,11 @@ celt/arm/fixed_armv5e.h \
 celt/arm/kiss_fft_armv4.h \
 celt/arm/kiss_fft_armv5e.h \
 celt/arm/pitch_arm.h \
+celt/mips/celt_mipsr1.h \
+celt/mips/fixed_generic_mipsr1.h \
+celt/mips/kiss_fft_mipsr1.h \
+celt/mips/mdct_mipsr1.h \
+celt/mips/pitch_mipsr1.h \
+celt/mips/vq_mipsr1.h \
 celt/x86/pitch_sse.h \
 celt/x86/x86cpu.h

silk_headers.mk

@@ -27,6 +27,12 @@ silk/arm/SigProc_FIX_armv4.h \
 silk/arm/SigProc_FIX_armv5e.h \
 silk/fixed/main_FIX.h \
 silk/fixed/structs_FIX.h \
+silk/fixed/mips/noise_shape_analysis_FIX_mipsr1.h \
+silk/fixed/mips/prefilter_FIX_mipsr1.h \
+silk/fixed/mips/warped_autocorrelation_FIX_mipsr1.h \
 silk/float/main_FLP.h \
 silk/float/structs_FLP.h \
-silk/float/SigProc_FLP.h
+silk/float/SigProc_FLP.h \
+silk/mips/macros_mipsr1.h \
+silk/mips/NSQ_del_dec_mipsr1.h \
+silk/mips/sigproc_fix_mipsr1.h