Fold conv package into fmt

Both packages had nearly identical dependency requirements, so merging
them should help reduce the complexity of the build graph.

third_party/f2c/f2c.mk

@@ -22,16 +22,15 @@ THIRD_PARTY_F2C_A_CHECKS =				\
 	$(THIRD_PARTY_F2C_A_HDRS:%=o/$(MODE)/%.ok)
 
 THIRD_PARTY_F2C_A_DIRECTDEPS =				\
-	LIBC_CONV					\
 	LIBC_CALLS					\
 	LIBC_CALLS_HEFTY				\
-	LIBC_RUNTIME					\
-	LIBC_MEM					\
 	LIBC_FMT					\
+	LIBC_MEM					\
+	LIBC_NEXGEN32E					\
+	LIBC_RUNTIME					\
+	LIBC_STDIO					\
 	LIBC_STR					\
 	LIBC_STUBS					\
-	LIBC_STDIO					\
-	LIBC_NEXGEN32E					\
 	LIBC_UNICODE
 
 THIRD_PARTY_F2C_A_DEPS :=				\

third_party/f2c/wref.c

@@ -1,4 +1,4 @@
-#include "libc/conv/conv.h"
+#include "libc/fmt/conv.h"
 #include "libc/fmt/fmt.h"
 #include "libc/str/str.h"
 #include "third_party/f2c/fmt.h"