Fix filename and shorten length of first line of earlyincludes.h
Fix filename and shorten length of first line of earlyincludes.h

- It erroneously still was named WindowsPal.h, the name
of an earlier attempt to fix the include compatibility problem.

- The header line was too long, causing the formatter to
break the line and thus the formatting job to fail.

kyulee1/llilcjit,AndyAyersMS/llilc,BruceForstall/llilc,dotnet/llilc,AndyAyersMS/llilc,russellhadley/llilc,marksantos/llilc,kyulee1/llilcjit,manu-silicon/llilc,russellhadley/llilc,pgavlin/llilc,tempbottle/llilc,dkorolev/llilc,tempbottle/llilc,BruceForstall/llilc,russellhadley/llilc,pgavlin/llilc,marksantos/llilc,adiaaida/llilc,tempbottle/llilc,dkorolev/llilc,JosephTremoulet/llilc,swaroop-sridhar/llilc,dkorolev/llilc,marksantos/llilc,JosephTremoulet/llilc,manu-silicon/llilc,pgavlin/llilc,adiaaida/llilc,manu-silicon/llilc,dotnet/llilc,adiaaida/llilc,kyulee1/llilcjit,AndyAyersMS/llilc,BruceForstall/llilc,swaroop-sridhar/llilc,JosephTremoulet/llilc,swaroop-sridhar/llilc,dotnet/llilc