There are sed command errors in build.sh

[ChengWu-NJ]

modify bugs in build.sh

line276:
sed -i '' 's/-lgcc_s/-lgcc_eh/g' x265.pc
-->
sed -i 's/-lgcc_s/-lgcc_eh/g' x265.pc

line344:
sed -i "" "s/prefix=./prefix=${TARGET_DIR_SED}/" ./Makefile
-->
sed -i "s/prefix=./prefix=${TARGET_DIR_SED}/" ./Makefile

line361:
sed -i "" "s/vidstab SHARED/vidstab STATIC/" ./CMakeLists.txt
-->
sed -i "s/vidstab SHARED/vidstab STATIC/" ./CMakeLists.txt

[mmirold]

BSD sed (as used on MacOS X) needs those quotation marks after -i, i.e. the build fails on Mac after this change.