pronunciation.txt needs to retain BOM and tabs (#522)

* Revert "Remove BOM and hard tabs that habve been breaking samples repot builds for the last week."

This reverts commit 67bd7c5.

* exception for sampledata

* allow all sampledata/ .txt to potentially have a BOM or hard tabs

ci/check-git-head.sh

@@ -62,15 +62,15 @@ checkEmptyStdout \
 # Note: we rely on binary files being identified correctly (cf. above)
 # TODO limit to specific extensions if necessary
 checkEmptyStdout \
-  "git grep -I -l \$'\t' $gitTree | cut -d: -f2- | grep -v ^external/ | grep -v \.sln$ | grep -v /Makefile$ | grep -v project\.pbxproj | grep -v Info\.plist" \
+  "git grep -I -l \$'\t' $gitTree | cut -d: -f2- | grep -v -e ^external/ -e \.sln$ -e /Makefile$ -e project\.pbxproj -e Info\.plist -e sampledata/.*\.txt" \
   "text file(s) with hard tabs encountered"
 
 checkEmptyStdout \
   "git ls-tree --full-tree -l -r $gitTree | grep '^100644 blob .*\\.sh'" \
   "Shell scripts should have executable permissions set, please fix"
 
 checkEmptyStdout \
-  "git grep -I -l $'\xEF\xBB\xBF' $gitTree | cut -d: -f2" \
+  "git grep -I -l $'\xEF\xBB\xBF' $gitTree | cut -d: -f2 | grep -v sampledata/.*\.txt" \
   "BOM detected, please remove from beginning of files (or add an exception)"
 
 # Note: we rely on binary files being identified correctly (cf. above)

sampledata/customspeech/en-US/training/pronunciation.txt

@@ -1,3 +1,3 @@
-3CPO    three c p o
-CNTK    c n t k
-IEEE    i triple e
+3CPO	three c p o
+CNTK	c n t k
+IEEE	i triple e