.NOTPARALLEL for some targets (feature request)

[do1]

Hello,

Please make .NOTPARALLEL to accept prerequisites list, with meaning that these 
targets should not be build in parallel. 

This is similar to to ClearCase make, described there: 
http://publib.boulder.ibm.com/infocenter/cchelp/v7r0m0/index.jsp?topic=/com.ibm.rational.clearcase.books.cc_build_windows.doc/setting_up_a_parallel_build.htm

Example use is for disk intensive jobs not to be run in parallel, similar how 
fsck could be prevent running in parallel for disk partition of the same disk 
in fstab idea.

Best regards,