CMake build fix

- Move scalar kernels from SSE source section to scalar section.
- Copy scalar source file list from CMake to BUILD so they match.

PiperOrigin-RevId: 325564233
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1e3a73a..fb9b6b5 100755
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -481,6 +481,8 @@
   src/math/sigmoid-scalar-lut2048-p1-div.c
   src/math/sigmoid-scalar-lut64-p2-div.c
   src/math/sigmoid-scalar-p5-div.c
+  src/qs8-gemm/gen/8x8c4-minmax-scalar.c
+  src/qs8-gemm/gen/12x4c4-minmax-scalar.c
   src/qs8-requantization/fp32-scalar-lrintf.c
   src/qs8-requantization/fp32-scalar-magic.c
   src/qs8-requantization/precise-scalar-signed64.c
@@ -492,6 +494,8 @@
   src/qu8-dwconv/up1x9-minmax-scalar.c
   src/qu8-gavgpool/7p7x-minmax-scalar-c1.c
   src/qu8-gavgpool/7x-minmax-scalar-c1.c
+  src/qu8-gemm/gen/8x8c4-minmax-scalar.c
+  src/qu8-gemm/gen/12x4c4-minmax-scalar.c
   src/qu8-gemm/2x2-minmax-scalar.c
   src/qu8-igemm/2x2-minmax-scalar.c
   src/qu8-requantization/fp32-scalar-lrintf.c
@@ -1329,8 +1333,6 @@
   src/qs8-requantization/fp32-sse2.c
   src/qs8-requantization/precise-sse2.c
   src/qs8-requantization/q31-sse2.c
-  src/qs8-gemm/gen/8x8c4-minmax-scalar.c
-  src/qs8-gemm/gen/12x4c4-minmax-scalar.c
   src/qu8-avgpool/9p8x-minmax-sse2-c8.c
   src/qu8-avgpool/9x-minmax-sse2-c8.c
   src/qu8-igemm/4x4c2-minmax-sse2.c
@@ -1343,8 +1345,6 @@
   src/qu8-requantization/precise-sse2.c
   src/qu8-requantization/q31-sse2.c
   src/qu8-vadd/minmax-sse2.c
-  src/qu8-gemm/gen/8x8c4-minmax-scalar.c
-  src/qu8-gemm/gen/12x4c4-minmax-scalar.c
   src/u8-clamp/sse2-x64.c
   src/u8-maxpool/9p8x-minmax-sse2-c16.c
   src/u8-rmax/sse2.c