[e-acsl] - generated variable names are shortest

	 - fixed bug when reusing variables in a different typing context
	 - fixed bug with boolean
	 - fixed bug with negation and GMP integers
	 - fixed bug with conditional and GMP integers
	 - fixed wrongly generated oracles

src/plugins/e-acsl/tests/e-acsl-runtime/quantif.i

 /* run.config
    COMMENT: quantifiers
    EXECNOW: LOG gen_quantif.c BIN gen_quantif.out FRAMAC_SHARE=./share @frama-c@ ./tests/e-acsl-runtime/quantif.i -e-acsl -then-on e-acsl -print -ocode ./tests/e-acsl-runtime/result/gen_quantif.c > /dev/null && gcc -pedantic -o ./tests/e-acsl-runtime/result/gen_quantif.out ./tests/e-acsl-runtime/result/gen_quantif.c -lgmp && ./tests/e-acsl-runtime/result/gen_quantif.out
-   EXECNOW: LOG gen_quantif2.c BIN gen_quantif2.out FRAMAC_SHARE=./share @frama-c@ ./tests/e-acsl-runtime/arith.i -e-acsl-gmp-only -e-acsl -then-on e-acsl -print -ocode ./tests/e-acsl-runtime/result/gen_quantif2.c > /dev/null && gcc -pedantic -Wno-long-long -o ./tests/e-acsl-runtime/result/gen_quantif2.out ./tests/e-acsl-runtime/result/gen_quantif2.c -lgmp && ./tests/e-acsl-runtime/result/gen_quantif2.out
+   EXECNOW: LOG gen_quantif2.c BIN gen_quantif2.out FRAMAC_SHARE=./share @frama-c@ ./tests/e-acsl-runtime/quantif.i -e-acsl-gmp-only -e-acsl -then-on e-acsl -print -ocode ./tests/e-acsl-runtime/result/gen_quantif2.c > /dev/null && gcc -pedantic -Wno-long-long -o ./tests/e-acsl-runtime/result/gen_quantif2.out ./tests/e-acsl-runtime/result/gen_quantif2.c -lgmp && ./tests/e-acsl-runtime/result/gen_quantif2.out
 */
 
 int main(void) {