Added a few exception in for in ccode for ANSI math.h functions
Added a few exception in for in ccode for ANSI math.h functions

sympy ceiling = ANSI C ceil
sympy abs = ANSI C fabs (for floating point arguments)

Signed-off-by: Ondrej Certik <b816faa87b7d35274d2e545c5be11ed4376f3ccf@certik.cz>

Gadal/sympy,jamesblunt/sympy,moble/sympy,jamesblunt/sympy,minrk/sympy,sampadsaha5/sympy,sunny94/temp,lidavidm/sympy,Mitchkoens/sympy,souravsingh/sympy,hazelnusse/sympy-old,fperez/sympy,Gadal/sympy,saurabhjn76/sympy,shipci/sympy,cccfran/sympy,Shaswat27/sympy,rahuldan/sympy,Sumith1896/sympy,debugger22/sympy,ChristinaZografou/sympy,Vishluck/sympy,mcdaniel67/sympy,skirpichev/omg,iamutkarshtiwari/sympy,Davidjohnwilson/sympy,ChristinaZografou/sympy,asm666/sympy,ahhda/sympy,Titan-C/sympy,ChristinaZografou/sympy,aktech/sympy,beni55/sympy,Titan-C/sympy,emon10005/sympy,maniteja123/sympy,hrashk/sympy,abloomston/sympy,Mitchkoens/sympy,lidavidm/sympy,toolforger/sympy,bukzor/sympy,oliverlee/sympy,madan96/sympy,jbaayen/sympy,maniteja123/sympy,hrashk/sympy,pbrady/sympy,meghana1995/sympy,meghana1995/sympy,amitjamadagni/sympy,atreyv/sympy,meghana1995/sympy,grevutiu-gabriel/sympy,sahmed95/sympy,grevutiu-gabriel/sympy,farhaanbukhsh/sympy,wanglongqi/sympy,Sumith1896/sympy,lindsayad/sympy,flacjacket/sympy,lindsayad/sympy,oliverlee/sympy,kaushik94/sympy,wyom/sympy,debugger22/sympy,jbbskinny/sympy,hargup/sympy,iamutkarshtiwari/sympy,ahhda/sympy,dqnykamp/sympy,Sumith1896/sympy,AunShiLord/sympy,kevalds51/sympy,postvakje/sympy,ahhda/sympy,jaimahajan1997/sympy,ryanGT/sympy,Designist/sympy,oliverlee/sympy,jerli/sympy,souravsingh/sympy,dqnykamp/sympy,jbbskinny/sympy,Arafatk/sympy,postvakje/sympy,shikil/sympy,madan96/sympy,yukoba/sympy,Curious72/sympy,amitjamadagni/sympy,yukoba/sympy,mafiya69/sympy,sahilshekhawat/sympy,iamutkarshtiwari/sympy,lidavidm/sympy,sahmed95/sympy,Arafatk/sympy,yashsharan/sympy,jamesblunt/sympy,sahilshekhawat/sympy,farhaanbukhsh/sympy,atsao72/sympy,Curious72/sympy,lindsayad/sympy,toolforger/sympy,kaushik94/sympy,Curious72/sympy,aktech/sympy,hrashk/sympy,kumarkrishna/sympy,kevalds51/sympy,cswiercz/sympy,Gadal/sympy,jaimahajan1997/sympy,MridulS/sympy,mcdaniel67/sympy,VaibhavAgarwalVA/sympy,pernici/sympy,mafiya69/sympy,AunShiLord/sympy,bukzor/sympy,chaffra/sympy,emon10005/sympy,kumarkrishna/sympy,Shaswat27/sympy,chaffra/sympy,MechCoder/sympy,MridulS/sympy,maniteja123/sympy,madan96/sympy,kmacinnis/sympy,chaffra/sympy,kumarkrishna/sympy,jbbskinny/sympy,Davidjohnwilson/sympy,srjoglekar246/sympy,toolforger/sympy,Designist/sympy,shipci/sympy,sunny94/temp,atsao72/sympy,cccfran/sympy,sahmed95/sympy,garvitr/sympy,liangjiaxing/sympy,bukzor/sympy,hargup/sympy,drufat/sympy,jerli/sympy,yashsharan/sympy,VaibhavAgarwalVA/sympy,mcdaniel67/sympy,mafiya69/sympy,cccfran/sympy,hazelnusse/sympy-old,MechCoder/sympy,Arafatk/sympy,pbrady/sympy,debugger22/sympy,garvitr/sympy,grevutiu-gabriel/sympy,AkademieOlympia/sympy,yukoba/sympy,aktech/sympy,wanglongqi/sympy,atreyv/sympy,rahuldan/sympy,Vishluck/sympy,Titan-C/sympy,shipci/sympy,ga7g08/sympy,pandeyadarsh/sympy,souravsingh/sympy,abhiii5459/sympy,abloomston/sympy,beni55/sympy,kaichogami/sympy,wyom/sympy,kaichogami/sympy,rahuldan/sympy,KevinGoodsell/sympy,sunny94/temp,drufat/sympy,asm666/sympy,vipulroxx/sympy,kmacinnis/sympy,ga7g08/sympy,Mitchkoens/sympy,pbrady/sympy,jaimahajan1997/sympy,jerli/sympy,Vishluck/sympy,shikil/sympy,liangjiaxing/sympy,kevalds51/sympy,abhiii5459/sympy,MechCoder/sympy,diofant/diofant,minrk/sympy,ga7g08/sympy,sahilshekhawat/sympy,postvakje/sympy,pandeyadarsh/sympy,beni55/sympy,wanglongqi/sympy,cswiercz/sympy,Davidjohnwilson/sympy,moble/sympy,sampadsaha5/sympy,skidzo/sympy,AkademieOlympia/sympy,Designist/sympy,cswiercz/sympy,kmacinnis/sympy,moble/sympy,atsao72/sympy,mattpap/sympy-polys,AunShiLord/sympy,skidzo/sympy,pandeyadarsh/sympy,saurabhjn76/sympy,yashsharan/sympy,kaushik94/sympy,saurabhjn76/sympy,vipulroxx/sympy,shikil/sympy,abloomston/sympy,drufat/sympy,MridulS/sympy,Shaswat27/sympy,skidzo/sympy,sampadsaha5/sympy,hargup/sympy,liangjiaxing/sympy,wyom/sympy,AkademieOlympia/sympy,asm666/sympy,vipulroxx/sympy,kaichogami/sympy,farhaanbukhsh/sympy,VaibhavAgarwalVA/sympy,tovrstra/sympy,dqnykamp/sympy,emon10005/sympy,abhiii5459/sympy,atreyv/sympy,garvitr/sympy