mathomatic: Minor changes

- Enable readline.
- Remove .desktop files and icon not used in Termux.
- Compile with -DUSE_TGAMMA to remove warning and improve speed.
- Compile with -DBOLD_COLOR to improve color visibility.

packages/mathomatic/build.sh

@@ -1,9 +1,14 @@
 TERMUX_PKG_VERSION=16.0.5
+TERMUX_PKG_BUILD_REVISION=1
 TERMUX_PKG_HOMEPAGE=http://www.mathomatic.org/
 TERMUX_PKG_DESCRIPTION="Simple CAS and symbolic calculator"
 TERMUX_PKG_SRCURL="http://mathomatic.orgserve.de/mathomatic-$TERMUX_PKG_VERSION.tar.bz2"
 TERMUX_PKG_BUILD_IN_SRC=yes
+TERMUX_PKG_EXTRA_MAKE_ARGS="READLINE=1"
+TERMUX_PKG_DEPENDS="readline"
+TERMUX_PKG_RM_AFTER_INSTALL="share/applications/mathomatic.desktop share/pixmaps"
 TERMUX_PKG_MAINTAINER="Jonathan Badger <jhbadger@gmail.com>"
 
 export PREFIX=$TERMUX_PREFIX
+CPPFLAGS+=" -DUSE_TGAMMA -DBOLD_COLOR"