Generalize make.conf man page: use "cc" instead of "gcc"

PR:		misc/173604
Submitted by:	Dan McGregor <dan.mcgregor@usask.ca>
Approved by:	bcr (mentor)
MFC after:	3 days

share/man/man5/make.conf.5

@@ -143,7 +143,7 @@ and
 are not supported.
 .Va BDECFLAGS
 is provided as a set of
-.Xr gcc 1
+.Xr cc 1
 settings suggested by
 .An "Bruce Evans" Aq bde@FreeBSD.org
 for developing and testing changes.
@@ -162,7 +162,7 @@ the value of
 and
 .Va COPTFLAGS
 to contain the appropriate optimization directive to
-.Xr gcc 1 .
+.Xr cc 1 .
 The automatic setting of
 .Va CFLAGS
 and
@@ -693,7 +693,7 @@ The default number is 20011.
 .Pq Vt int
 Causes the system compiler to be built such that it forces high optimization
 levels to a lower one.
-.Xr gcc 1
+.Xr cc 1
 .Fl O2
 and above is known to trigger known optimizer bugs at various
 times.
@@ -735,7 +735,7 @@ filter, or both.
 .It Pa /usr/src/Makefile.inc1
 .El
 .Sh SEE ALSO
-.Xr gcc 1 ,
+.Xr cc 1 ,
 .Xr install 1 ,
 .Xr make 1 ,
 .Xr src.conf 5 ,