fix install_libortools_mac.sh
fix install_libortools_mac.sh

ThatRfernand/or-tools,WendellDuncan/or-tools,WendellDuncan/or-tools,legrosbuffle/or-tools,google/or-tools,or-tools/or-tools,ThatRfernand/or-tools,legrosbuffle/or-tools,WendellDuncan/or-tools,legrosbuffle/or-tools,WendellDuncan/or-tools,WendellDuncan/or-tools,or-tools/or-tools,ThatRfernand/or-tools,legrosbuffle/or-tools,WendellDuncan/or-tools,or-tools/or-tools,or-tools/or-tools,google/or-tools,google/or-tools,ThatRfernand/or-tools,legrosbuffle/or-tools,google/or-tools,ThatRfernand/or-tools,or-tools/or-tools,or-tools/or-tools,google/or-tools,google/or-tools