Fix typo-ed function names in efgcvt.c documentation

Fix typo-ed function names in efgcvt.c documentation, neither gvcvt nor gdvtf
exists.

2015-06-23  Jon Turney  <jon.turney@dronecode.org.uk>

	* libc/stdlib/efgcvt.c: Fix typo-ed function names in
	documentation.
	* libc/stdlib/stdlib.tex: Fix function name in menu to match.

Signed-off-by: Jon TURNEY <jon.turney@dronecode.org.uk>

newlib/ChangeLog

@@ -1,3 +1,9 @@
+2015-06-23  Jon Turney  <jon.turney@dronecode.org.uk>
+
+	* libc/stdlib/efgcvt.c: Fix typo-ed function names in
+	documentation.
+	* libc/stdlib/stdlib.tex: Fix function name in menu to match.
+
 2015-06-23  Jon Turney  <jon.turney@dronecode.org.uk>
 
 	* libc/stdio/fread.c: Fix inconsistent use of '.' to separate

newlib/libc/stdlib/efgcvt.c

@@ -84,7 +84,7 @@ Supporting OS subroutines required: <<close>>, <<fstat>>, <<isatty>>,
 
 NEWPAGE
 FUNCTION
-<<gvcvt>>, <<gcvtf>>---format double or float as string
+<<gcvt>>, <<gcvtf>>---format double or float as string
 
 INDEX
 	gcvt
@@ -111,7 +111,7 @@ TRAD_SYNOPSIS
 
 DESCRIPTION
 <<gcvt>> writes a fully formatted number as a null-terminated
-string in the buffer <<*<[buf]>>>.  <<gdvtf>> produces corresponding
+string in the buffer <<*<[buf]>>>.  <<gcvtf>> produces corresponding
 character representations of <<float>> numbers.
 
 <<gcvt>> uses the same rules as the <<printf>> format

newlib/libc/stdlib/stdlib.tex

@@ -20,7 +20,7 @@ The corresponding declarations are in the header file @file{stdlib.h}.
 * ecvtbuf::     Double or float to string of digits
 * ecvt::        Double or float to string of digits (malloc result)
 * __env_lock::		Lock environment list for getenv and setenv
-* gvcvt::       Format double or float as string
+* gcvt::        Format double or float as string
 * exit::        End program execution
 * getenv::      Look up environment variable
 * labs::        Long integer absolute value (magnitude)