Rename arm ne10 assembly optimization files.

Make these consistent with the other optimization file
sets which use a suffix to indicate the extension they
use.

Signed-off-by: Jonathan Lennox <jonathan@vidyo.com>

celt/arm/celt_ne10_fft.c → celt/arm/celt_fft_ne10.c

 /* Copyright (c) 2015 Xiph.Org Foundation
    Written by Viswanath Puttagunta */
 /**
-   @file celt_ne10_fft.c
+   @file celt_fft_ne10.c
    @brief ARM Neon optimizations for fft using NE10 library
  */
 

celt/arm/celt_ne10_mdct.c → celt/arm/celt_mdct_ne10.c

 /* Copyright (c) 2015 Xiph.Org Foundation
    Written by Viswanath Puttagunta */
 /**
-   @file celt_ne10_mdct.c
+   @file celt_mdct_ne10.c
    @brief ARM Neon optimizations for mdct using NE10 library
  */
 

celt_sources.mk

@@ -45,5 +45,5 @@ celt/arm/celt_neon_intr.c \
 celt/arm/pitch_neon_intr.c
 
 CELT_SOURCES_ARM_NE10 = \
-celt/arm/celt_ne10_fft.c \
-celt/arm/celt_ne10_mdct.c
+celt/arm/celt_fft_ne10.c \
+celt/arm/celt_mdct_ne10.c