add coverity build and upload script

coverity.sh

@@ -0,0 +1,28 @@
+#!/bin/bash
+
+if [ $# -lt 3 ]
+then
+  echo "usage is: ${0##*/} <path to coverity scan> <path to libtommath include files> <path to libtommath.a>"
+  echo "e.g. \"${0##*/} \"/usr/local/bin/coverity\" \"/path/to/libtommath\" /path/to/libtommath/libtommath.a\""
+  exit -1
+fi
+
+PATH=$PATH:$1/bin
+
+make clean
+CFLAGS=" -O2 -DUSE_LTM -DLTM_DESC -I${2}" EXTRALIBS="${3}" cov-build --dir cov-int  make -f makefile -j3 IGNORE_SPEED=1 1>gcc_1.txt
+
+# zipup everything
+tar caf libtomcrypt.lzma cov-int
+
+mytoken=$(cat .coverity_token)
+mymail=$(cat .coverity_mail)
+myversion=$(git describe --dirty)
+
+curl --form project=libtomcrypt \
+  --form token=${mytoken} \
+  --form email=${mymail} \
+  --form file=@libtomcrypt.lzma \
+  --form version='"${myversion}"' \
+  --form description='"libtomcrypt version ${myversion}"' \
+  https://scan.coverity.com/builds?project=libtomcrypt