add note on macOS on where the executables are in the bundle

bundle_onelab.sh

@@ -199,6 +199,9 @@ if [ $# -lt 1 ] || [ $1 == "macosx" ]; then
   ##tar zxvf /tmp/getdp-${GETDP}-MacOSXr.tgz -C /tmp
   unzip -q -o /tmp/conveks-${CONVEKS}-MacOSX.zip -d /tmp
   cp /tmp/README.txt onelab-MacOSX
+  echo "
+(The gmsh and getdp executables as well as the libraries and module files
+are located in the .app bundle, i.e. in Gmsh.app/Contents/MacOS/.)" >> onelab-MacOSX/README.txt
   cp -R gmsh_mount/Gmsh.app onelab-MacOSX/
   mv /tmp/getdp-*${GETDP}-MacOSX/bin/getdp onelab-MacOSX/Gmsh.app/Contents/MacOS/
   mv /tmp/conveks-*${CONVEKS}-MacOSX/lib/conveks.py onelab-MacOSX/Gmsh.app/Contents/MacOS/
@@ -244,6 +247,9 @@ if [ $# -lt 1 ] || [ $1 == "macosarm" ]; then
   ##tar zxvf /tmp/getdp-${GETDP}-MacOSARMr.tgz -C /tmp
   unzip -q -o /tmp/conveks-${CONVEKS}-MacOSARM.zip -d /tmp
   cp /tmp/README.txt onelab-MacOSARM
+  echo "
+(The gmsh and getdp executables as well as the libraries and module files
+are located in the .app bundle, i.e. in Gmsh.app/Contents/MacOS/.)" >> onelab-MacOSARM/README.txt
   cp -R gmsh_mount/Gmsh.app onelab-MacOSARM/
   mv /tmp/getdp-*${GETDP}-MacOSARM/bin/getdp onelab-MacOSARM/Gmsh.app/Contents/MacOS/
   mv /tmp/conveks-*${CONVEKS}-MacOSARM/lib/conveks.py onelab-MacOSARM/Gmsh.app/Contents/MacOS/