etc/config.*/settings: Remove unnecessary $WM_COMPILE_OPTION from $FOAM_EXT_LIBBIN

Simplified the directory structure in ThirdParty-dev/platforms

etc/config.csh/settings

@@ -150,7 +150,7 @@ setenv FOAM_APPBIN $WM_PROJECT_DIR/platforms/$WM_OPTIONS/bin
 setenv FOAM_LIBBIN $WM_PROJECT_DIR/platforms/$WM_OPTIONS/lib
 
 # External (ThirdParty) libraries
-setenv FOAM_EXT_LIBBIN $WM_THIRD_PARTY_DIR/platforms/$WM_OPTIONS/lib
+setenv FOAM_EXT_LIBBIN $WM_THIRD_PARTY_DIR/platforms/$WM_ARCH$WM_COMPILER$WM_PRECISION_OPTION$WM_LABEL_OPTION/lib
 
 # Site-specific directory
 if ( $?WM_PROJECT_SITE ) then

etc/config.sh/settings

@@ -148,7 +148,7 @@ export FOAM_APPBIN=$WM_PROJECT_DIR/platforms/$WM_OPTIONS/bin
 export FOAM_LIBBIN=$WM_PROJECT_DIR/platforms/$WM_OPTIONS/lib
 
 # External (ThirdParty) libraries
-export FOAM_EXT_LIBBIN=$WM_THIRD_PARTY_DIR/platforms/$WM_OPTIONS/lib
+export FOAM_EXT_LIBBIN=$WM_THIRD_PARTY_DIR/platforms/$WM_ARCH$WM_COMPILER$WM_PRECISION_OPTION$WM_LABEL_OPTION/lib
 
 # Site-specific directory
 siteDir="${WM_PROJECT_SITE:-$WM_PROJECT_INST_DIR/site}"